碳二加氢催化剂再生尾气减排与治理
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摘要
分析了乙烯装置碳二加氢催化剂再生时产生臭气的原因,为减少污染物产生的来源,采取了通过操作优化延长催化剂运行周期从而减少再生次数的措施,有效减少了再生气排放量。通过改进再生流程,将再生初期的绿油汽提至火炬管网,有效减少了污染物的直接排放;并从末端治理出发,进行臭气治理改造,降低再生废气温度,分离废气中大部分绿油组分,剩余废气再经过活性炭吸附后排放,有效降低了排放废气中污染物的浓度,实现了碳二加氢再生尾气的减排,改善了再生时的作业环境,减少了环境污染。
This paper analyzes the causes of odors generated from C_2 hydrogenation catalyst regeneration in ethylene plant. The operation cycle of catalyst is prolonged through operation optimization and the regeneration times are reduced so as to lessen the pollutant sources and reduce the amount of regeneration gas emissions effectively. The green oil at the early stage of regeneration is stripped to the flare pipe network through improving the regeneration process to reduce the direct emissions of pollutants greatly. Starting from the terminal treatment, odors are treated; the temperature of regenerated exhaust gas is reduced; most of the green oil components in the exhaust gas are separated; the remaining exhaust gas is discharged after being absorbed by activated carbon; therefore, the concentration of pollutants in the discharged exhaust gas is reduced vastly and the emission reduction of tail gas from C_2 hydrogenation catalyst regeneration is achieved. The working environment during regeneration operation is improved and environmental pollution is reduced.
This paper analyzes the causes of odors generated from C_2 hydrogenation catalyst regeneration in ethylene plant. The operation cycle of catalyst is prolonged through operation optimization and the regeneration times are reduced so as to lessen the pollutant sources and reduce the amount of regeneration gas emissions effectively. The green oil at the early stage of regeneration is stripped to the flare pipe network through improving the regeneration process to reduce the direct emissions of pollutants greatly. Starting from the terminal treatment, odors are treated; the temperature of regenerated exhaust gas is reduced; most of the green oil components in the exhaust gas are separated; the remaining exhaust gas is discharged after being absorbed by activated carbon; therefore, the concentration of pollutants in the discharged exhaust gas is reduced vastly and the emission reduction of tail gas from C_2 hydrogenation catalyst regeneration is achieved. The working environment during regeneration operation is improved and environmental pollution is reduced.
引文
[1]王松汉,主编.乙烯装置技术与运行[M].北京:中国石化出版社,2009:651-652.
[2]王松汉,等主编.乙烯工艺与技术[M].北京:中国石化出版社,2012:272-273.
[3]许伟,刘军利,孙康.活性炭吸附法在挥发性有机物治理中的应用研究进展[J].化工进展, 2016,35(4):1223-1229.
[4]李立清,宋剑飞,孙政,等.三种vocs物性对其在活性炭上吸附行为的影响[J].化工学报,2011,62(10):2784-2790.
[2]王松汉,等主编.乙烯工艺与技术[M].北京:中国石化出版社,2012:272-273.
[3]许伟,刘军利,孙康.活性炭吸附法在挥发性有机物治理中的应用研究进展[J].化工进展, 2016,35(4):1223-1229.
[4]李立清,宋剑飞,孙政,等.三种vocs物性对其在活性炭上吸附行为的影响[J].化工学报,2011,62(10):2784-2790.